#ifndef __NR_UTILS_H__
#define __NR_UTILS_H__
/********************************* TRICK HEADER *******************************
PURPOSE:
      (Math utility functions)
LIBRARY DEPENDENCY:
      ((../src/nrutil.c))
*******************************************************************************/
// extern "C"
// {
static float sqrarg;
#define SQR(a) ((sqrarg = (a)) == 0.0 ? 0.0 : sqrarg * sqrarg)

static double dsqrarg;
#define DSQR(a) ((dsqrarg = (a)) == 0.0 ? 0.0 : dsqrarg * dsqrarg)

static double dmaxarg1, dmaxarg2;
#define DMAX(a, b) (dmaxarg1 = (a), dmaxarg2 = (b), (dmaxarg1) > (dmaxarg2) ? (dmaxarg1) : (dmaxarg2))

static double dminarg1, dminarg2;
#define DMIN(a, b) (dminarg1 = (a), dminarg2 = (b), (dminarg1) < (dminarg2) ? (dminarg1) : (dminarg2))

static float maxarg1, maxarg2;
#define FMAX(a, b) (maxarg1 = (a), maxarg2 = (b), (maxarg1) > (maxarg2) ? (maxarg1) : (maxarg2))

static float minarg1, minarg2;
#define FMIN(a, b) (minarg1 = (a), minarg2 = (b), (minarg1) < (minarg2) ? (minarg1) : (minarg2))

static long lmaxarg1, lmaxarg2;
#define LMAX(a, b) (lmaxarg1 = (a), lmaxarg2 = (b), (lmaxarg1) > (lmaxarg2) ? (lmaxarg1) : (lmaxarg2))

static long lminarg1, lminarg2;
#define LMIN(a, b) (lminarg1 = (a), lminarg2 = (b), (lminarg1) < (lminarg2) ? (lminarg1) : (lminarg2))

static int imaxarg1, imaxarg2;
#define IMAX(a, b) (imaxarg1 = (a), imaxarg2 = (b), (imaxarg1) > (imaxarg2) ? (imaxarg1) : (imaxarg2))

static int iminarg1, iminarg2;
#define IMIN(a, b) (iminarg1 = (a), iminarg2 = (b), (iminarg1) < (iminarg2) ? (iminarg1) : (iminarg2))

#define SIGN(a, b) ((b) >= 0.0 ? fabs(a) : -fabs(a))

#if defined(__STDC__) || defined(ANSI) || defined(NRANSI) /* ANSI */

void nrerror(char error_text[]);
float *vector(long nl, long nh);
int *ivector(long nl, long nh);
unsigned char *cvector(long nl, long nh);
unsigned long *lvector(long nl, long nh);
double *dvector(long nl, long nh);
float **matrix(long nrl, long nrh, long ncl, long nch);
double **dmatrix(long nrl, long nrh, long ncl, long nch);
int **imatrix(long nrl, long nrh, long ncl, long nch);
float **submatrix(float **a, long oldrl, long oldrh, long oldcl, long oldch,
                  long newrl, long newcl);
float **convert_matrix(float *a, long nrl, long nrh, long ncl, long nch);
float ***f3tensor(long nrl, long nrh, long ncl, long nch, long ndl, long ndh);
void free_vector(float *v, long nl, long nh);
void free_ivector(int *v, long nl, long nh);
void free_cvector(unsigned char *v, long nl, long nh);
void free_lvector(unsigned long *v, long nl, long nh);
void free_dvector(double *v, long nl, long nh);
void free_matrix(float **m, long nrl, long nrh, long ncl, long nch);
void free_dmatrix(double **m, long nrl, long nrh, long ncl, long nch);
void free_imatrix(int **m, long nrl, long nrh, long ncl, long nch);
void free_submatrix(float **b, long nrl, long nrh, long ncl, long nch);
void free_convert_matrix(float **b, long nrl, long nrh, long ncl, long nch);
void free_f3tensor(float ***t, long nrl, long nrh, long ncl, long nch,
                   long ndl, long ndh);

#else /* ANSI */
/* traditional - K&R */

void nrerror();
float *vector();
float **matrix();
float **submatrix();
float **convert_matrix();
float ***f3tensor();
double *dvector();
double **dmatrix();
int *ivector();
int **imatrix();
unsigned char *cvector();
unsigned long *lvector();
void free_vector();
void free_dvector();
void free_ivector();
void free_cvector();
void free_lvector();
void free_matrix();
void free_submatrix();
void free_convert_matrix();
void free_dmatrix();
void free_imatrix();
void free_f3tensor();
// }

#endif /* ANSI */

#endif /* __NR_UTILS_H__ */
